107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: A higher level link library for general use in the game and tools.
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//
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//===========================================================================//
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#ifndef TIER1_H
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#define TIER1_H
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#if defined( _WIN32 )
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#pragma once
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#endif
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#include "appframework/IAppSystem.h"
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#include "tier1/convar.h"
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//-----------------------------------------------------------------------------
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// Forward declarations
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//-----------------------------------------------------------------------------
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class ICvar;
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class IProcessUtils;
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//-----------------------------------------------------------------------------
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// These tier1 libraries must be set by any users of this library.
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// They can be set by calling ConnectTier1Libraries.
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// It is hoped that setting this, and using this library will be the common mechanism for
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// allowing link libraries to access tier1 library interfaces
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//-----------------------------------------------------------------------------
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// These are marked DLL_EXPORT for Linux.
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DLL_EXPORT ICvar *cvar;
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extern ICvar *g_pCVar;
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extern IProcessUtils *g_pProcessUtils;
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//-----------------------------------------------------------------------------
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// Call this to connect to/disconnect from all tier 1 libraries.
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// It's up to the caller to check the globals it cares about to see if ones are missing
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//-----------------------------------------------------------------------------
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void ConnectTier1Libraries( CreateInterfaceFn *pFactoryList, int nFactoryCount );
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void DisconnectTier1Libraries();
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//-----------------------------------------------------------------------------
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// Helper empty implementation of an IAppSystem for tier2 libraries
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//-----------------------------------------------------------------------------
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template< class IInterface, int ConVarFlag = 0 >
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class CTier1AppSystem : public CTier0AppSystem< IInterface >
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{
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typedef CTier0AppSystem< IInterface > BaseClass;
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public:
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CTier1AppSystem( bool bIsPrimaryAppSystem = true ) : BaseClass( bIsPrimaryAppSystem )
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{
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}
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virtual bool Connect( CreateInterfaceFn factory )
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{
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if ( !BaseClass::Connect( factory ) )
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return false;
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if ( BaseClass::IsPrimaryAppSystem() )
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{
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ConnectTier1Libraries( &factory, 1 );
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}
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return true;
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}
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virtual void Disconnect()
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{
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if ( BaseClass::IsPrimaryAppSystem() )
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{
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DisconnectTier1Libraries();
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}
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BaseClass::Disconnect();
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}
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virtual InitReturnVal_t Init()
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{
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InitReturnVal_t nRetVal = BaseClass::Init();
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if ( nRetVal != INIT_OK )
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return nRetVal;
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if ( g_pCVar && BaseClass::IsPrimaryAppSystem() )
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{
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ConVar_Register( ConVarFlag );
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}
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return INIT_OK;
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}
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virtual void Shutdown()
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{
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if ( g_pCVar && BaseClass::IsPrimaryAppSystem() )
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{
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ConVar_Unregister( );
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}
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BaseClass::Shutdown( );
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}
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};
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#endif // TIER1_H
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